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The Battery item
The Battery is a passive item in The Binding of Isaac.
Description
Allows active items to store an additional full level of charge.
Extra charges appear as yellow bars on top of the normal charge meter.
Note
This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this item for the previous Repentance version, check this page instead.
Item pools
The Battery can be found in the following item pools:
| Name | Weight |
|---|---|
| Shop |
1.0/1.0
|
| Battery Bum |
1.0/1.0
|
| Greed Shop |
1.0/1.0
|
| Crane Game |
1.0/1.0
|
Tags
The following tags are applied to this item:
| Id | Description |
|---|---|
| battery | Contributes towards unlocking  Jumper Cables. |
| summonable | Can be summoned via  Lemegeton. |
| offensive | Can appear for  Tainted Lost. |
| nocantrip | Not available as card effects during the Cantripped! challenge. |
Special synergies
The following special synergies and interactions for The Battery have been documented.
| Mod | Item | Synergy |
|---|---|---|
| --- | Abyss | Spawns an electrical cyan locust that has a chance to chain-zap enemies similar to the effects of  Jacob's Ladder. Zaps deal 0.1 damage. |
* Note that not all possible synergies and interactions are listed here.
External links
- Check out the item description on the external Isaac Wiki.
Book of Shadows 
The Ladder 
Charm of the Vampire 
Steam Sale 
Anarchist Cookbook 
The Hourglass